With Twitter adding its own photo uploads, we thought it'd be a nice time to go through some of the intelligent mashups that use photos posted to Twitter in an interesting way. I bet a lot of these will get some nice updates to integrate the official Twitter photo capability. First of all, we'll talk about the recent Mashup of the Day, Hashtagram.

Why did Pinterest remove its API documentation earlier this year? Well, apparently there is no rush to release an already developed API to the public yet. In fact, it may not be released for a while as Pinterest wants to avoid re-tweeting the #mistakes Twitter made in its infancy.